1 definition
by
godzilla through tokyo

when u cup your hand and fat into it the stick the still cupped hand willed with fart juices and nasty stank over there mouth and nose, mouth is important because alot of people will lick your hand to try to deter you, forcing to make them smell the disgusting concoction of aromas. The most important part of a ninja potion is you must whisper in there ear NINJA POTION like a real ninja would.

hey guys havent seen mark in a while yah last time i heard he was training to be a ninja,
all while mark sneaks up behind him and puts his hand over his face and whispers ninja potion as the man slowly passes out